M3A76-CM memory installation problem

handyguy

n00b
Joined
Jan 27, 2021
Messages
1
Hi,
I am trying to upgrade the memory on this old motherboard for my wife. Manual says it can take 4 ddr2 dimms, up to 2gb each. The processor is an AMD Athlon II X2 250 running windows10 (so all 64bit capable) the bios is 2101 (the latest.)
I installed a new(old) pair of matched 2x2gb dimms into the first two slots (1+2, should work as 2 channel,) but the bios shows only 2gb available (as does a boot into windows). All the memory bios settings are on automatic.
Each stick installed alone works fine as 2gb dimm. Tried the other slots (1+3, 3+4) and system would not post.
The dimms are labelled 2gb 2rx8 pc2-6400u-666-12-e0 ddr2 800 cl6 branded HP.
The previous memory was 2x1gb sticks (and bios showed 2gb, as did windows).
Any ideas? Thanks for the help!
 
Last edited:

chithanh

Gawd
Joined
Oct 18, 2010
Messages
867
I assume that you checked the BIOS already (latest version, memory remapping enabled, tried clear CMOS, etc.)
So each 2G DIMM will work fine in either slot 1 or 2 individually? What happens if you install 2G+1G or 2G+1G+1G?
Maybe the DIMM slots have bent pins?
 
Top